Robtex

Up: 166.111.8.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 166.111.8.0/25
Down right: 166.111.8.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
166.111.8.8	A+PTR	authe.tsinghua.edu.cn
166.111.8.18	PTR	mail.tsinghua.edu.cn
166.111.8.26	PTR	mail.thu.edu.cn
166.111.8.26	PTR	mail.tsinghua.edu.cn
166.111.8.26	A	dns.d.tsinghua.edu.cn
166.111.8.27	PTR	mails.thu.edu.cn
166.111.8.27	PTR	mails.tsinghua.edu.cn
166.111.8.28	A	dns-a.tsinghua.edu.cn
166.111.8.29	A	dns-b.tsinghua.edu.cn
166.111.8.30	A+PTR	dns.tsinghua.edu.cn
166.111.8.30	A	dns2.cers.edu.cn
166.111.8.30	A	dns2.tsinghua.edu.cn
166.111.8.31	A+PTR	dns2.tsinghua.edu.cn
166.111.8.44	PTR	mta0.tsinghua.edu.cn
166.111.8.45	PTR	mta1.tsinghua.edu.cn
166.111.8.45	PTR	tmail.tsinghua.edu.cn
166.111.8.48	PTR	mails.thu.edu.cn
166.111.8.48	PTR	mails.tsinghua.edu.cn
166.111.8.49	PTR	mails.thu.edu.cn
166.111.8.49	PTR	mails.tsinghua.edu.cn
166.111.8.50	PTR	mails.thu.edu.cn
166.111.8.50	PTR	mails.tsinghua.edu.cn
166.111.8.50	A	mails.tunet.edu.cn
166.111.8.51	PTR	mails.thu.edu.cn
166.111.8.51	PTR	mails.tsinghua.edu.cn
166.111.8.51	A	mails.tunet.edu.cn
166.111.8.52	PTR	mail.thu.edu.cn
166.111.8.52	PTR	mail.tsinghua.edu.cn
166.111.8.53	PTR	mail.thu.edu.cn
166.111.8.53	PTR	mail.tsinghua.edu.cn
166.111.8.54	PTR	mail.thu.edu.cn
166.111.8.54	PTR	mail.tsinghua.edu.cn
166.111.8.55	PTR	mail.thu.edu.cn
166.111.8.55	PTR	mail.tsinghua.edu.cn
166.111.8.58	A	mssite.tsinghua.edu.cn
166.111.8.80	PTR	smtp.tsinghua.edu.cn
166.111.8.80	PTR	smtp01.tsinghua.edu.cn
166.111.8.81	PTR	smtp.tsinghua.edu.cn
166.111.8.81	PTR	smtp02.tsinghua.edu.cn
166.111.8.85	PTR	bill.tsinghua.edu.cn
166.111.8.85	A	useradm.tsinghua.edu.cn
166.111.8.88	A	login.tsinghua.edu.cn
166.111.8.105	A	wsus.tsinghua.edu.cn
166.111.8.106	A	av.tsinghua.edu.cn
166.111.8.120	A	wifi.tsinghua.edu.cn
166.111.8.146	A+PTR	mail.nrc.tsinghua.edu.cn
166.111.8.150	A+PTR	nrc.tsinghua.edu.cn
166.111.8.150	A	cans2002.edu.cn
166.111.8.150	A	cans2008.edu.cn
166.111.8.169	A+PTR	thu.tsinghua.edu.cn
166.111.8.170	A	ussweb.tsinghua.edu.cn
166.111.8.170	A	netsupport.tsinghua.edu.cn
166.111.8.170	A	y.tsinghua.edu.cn
166.111.8.205	A	ipv6.tsinghua.edu.cn
166.111.8.214	A	webvpn.tsinghua.edu.cn
166.111.8.229	A	ftp.tsinghua.edu.cn
166.111.8.230	A+PTR	gmail.tsinghua.edu.cn
166.111.8.238	A+PTR	bbs.tsinghua.edu.cn
166.111.8.238	A	www.smth.edu.cn
166.111.8.238	A	bbs.thu.edu.cn